Presented by special guest host Kevin Pereira, it’s the Trending Now Top 5 Countdown for March 20, 2013 – where we gather the hottest and most outrageous must-see YouTube videos hitting the web today and send them all straight to your screen. It’s like watching the best of YouTube — only faster!

From Jimmy Fallon and Selena Gomez’s cover of “Mario Kart Love Song” to one boy asking Kate Upton to prom, we have you covered right here on What’s Trending.

For daily YouTube Trends and celebrity interviews, SUBSCRIBE and watch us every weekday at noon PT/3 pm ET on YouTube!